/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package com.feilong.lib.org.apache.http.impl.cookie;

import com.feilong.lib.org.apache.http.annotation.Contract;
import com.feilong.lib.org.apache.http.annotation.ThreadingBehavior;
import com.feilong.lib.org.apache.http.conn.util.PublicSuffixMatcher;
import com.feilong.lib.org.apache.http.cookie.Cookie;
import com.feilong.lib.org.apache.http.cookie.CookieOrigin;
import com.feilong.lib.org.apache.http.cookie.CookieSpec;
import com.feilong.lib.org.apache.http.cookie.CookieSpecProvider;
import com.feilong.lib.org.apache.http.cookie.MalformedCookieException;
import com.feilong.lib.org.apache.http.protocol.HttpContext;

/**
 * {@link com.feilong.lib.org.apache.http.cookie.CookieSpecProvider} implementation that provides an instance of
 * {@link com.feilong.lib.org.apache.http.impl.cookie.DefaultCookieSpec}. The instance returned by this factory can
 * be shared by multiple threads.
 *
 * @since 4.4
 */
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class DefaultCookieSpecProvider implements CookieSpecProvider{

    public enum CompatibilityLevel{
        DEFAULT, IE_MEDIUM_SECURITY
    }

    private final CompatibilityLevel  compatibilityLevel;

    private final PublicSuffixMatcher publicSuffixMatcher;

    private final String[]            datepatterns;

    private final boolean             oneHeader;

    private volatile CookieSpec       cookieSpec;

    public DefaultCookieSpecProvider(final CompatibilityLevel compatibilityLevel, final PublicSuffixMatcher publicSuffixMatcher,
                    final String[] datepatterns, final boolean oneHeader){
        super();
        this.compatibilityLevel = compatibilityLevel != null ? compatibilityLevel : CompatibilityLevel.DEFAULT;
        this.publicSuffixMatcher = publicSuffixMatcher;
        this.datepatterns = datepatterns;
        this.oneHeader = oneHeader;
    }

    public DefaultCookieSpecProvider(final CompatibilityLevel compatibilityLevel, final PublicSuffixMatcher publicSuffixMatcher){
        this(compatibilityLevel, publicSuffixMatcher, null, false);
    }

    public DefaultCookieSpecProvider(final PublicSuffixMatcher publicSuffixMatcher){
        this(CompatibilityLevel.DEFAULT, publicSuffixMatcher, null, false);
    }

    public DefaultCookieSpecProvider(){
        this(CompatibilityLevel.DEFAULT, null, null, false);
    }

    @Override
    public CookieSpec create(final HttpContext context){
        if (cookieSpec == null){
            synchronized (this){
                if (cookieSpec == null){
                    final RFC2965Spec strict = new RFC2965Spec(
                                    this.oneHeader,
                                    new RFC2965VersionAttributeHandler(),
                                    new BasicPathHandler(),
                                    PublicSuffixDomainFilter.decorate(new RFC2965DomainAttributeHandler(), this.publicSuffixMatcher),
                                    new RFC2965PortAttributeHandler(),
                                    new BasicMaxAgeHandler(),
                                    new BasicSecureHandler(),
                                    new BasicCommentHandler(),
                                    new RFC2965CommentUrlAttributeHandler(),
                                    new RFC2965DiscardAttributeHandler());
                    final RFC2109Spec obsoleteStrict = new RFC2109Spec(
                                    this.oneHeader,
                                    new RFC2109VersionHandler(),
                                    new BasicPathHandler(),
                                    PublicSuffixDomainFilter.decorate(new RFC2109DomainHandler(), this.publicSuffixMatcher),
                                    new BasicMaxAgeHandler(),
                                    new BasicSecureHandler(),
                                    new BasicCommentHandler());
                    final NetscapeDraftSpec netscapeDraft = new NetscapeDraftSpec(
                                    PublicSuffixDomainFilter.decorate(new BasicDomainHandler(), this.publicSuffixMatcher),
                                    this.compatibilityLevel == CompatibilityLevel.IE_MEDIUM_SECURITY ? new BasicPathHandler(){

                                        @Override
                                        public void validate(final Cookie cookie,final CookieOrigin origin) throws MalformedCookieException{
                                            // No validation
                                        }
                                    } : new BasicPathHandler(),
                                    new BasicSecureHandler(),
                                    new BasicCommentHandler(),
                                    new BasicExpiresHandler(
                                                    this.datepatterns != null ? this.datepatterns.clone()
                                                                    : new String[] { NetscapeDraftSpec.EXPIRES_PATTERN }));
                    this.cookieSpec = new DefaultCookieSpec(strict, obsoleteStrict, netscapeDraft);
                }
            }
        }
        return this.cookieSpec;
    }

}
